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Hisun 800 no spark

Steve Varao

By Steve Varao
in Hisun UTV SxS Forum

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Steve Varao Rookie

Steve Varao

Posted
Posted

HI All,

I have an 800cc Hisun fuel injected twin cylinder. Im trying to diagnose a no spark issue.  I had a bad crank sensor, replaced that and still got no spark and yes i doubled check the new one to make sure it was good.  Checked the both coil packs and they are both receiving power, also checked the resistance and both seem to be good.  It seems to me like the ECU is not sending the signal to the Coil packs.  Anyone have any idea how to test the ECU?  Any help or advice would be appreciated.  Thanks

Steve Varao Rookie

Steve Varao

Posted
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It has two coil packs, one for each cylinder and a crank position sensor.  I have already replaced the crank position sensor and double checked the ohm readings.  I have also checked the Coil packs and they both have identical resistance readings.  I cannot find a value for the coil packs but since they both read identically I'm leaning tword them being ok.  I also have 12v to the wires connecting to them.  

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  • 1 year later...
kenfain Experienced

kenfain

Posted
Posted

Have you checked all the fuses, or relay, specifically the one that provides power to the coils?

If all is good there, and you've replaced the crank position sensor. That doesn't leave much in a no spark condition, except for the CPU. 

 

Jody l Rookie

Jody l

Posted
Posted

I checked wires going to coil, I get 12 volts on one of the wires  when I turn the ignition on . Checked all fuses, dont know if there is anyway to check all the relays. I'm ordering new cpu today.

kenfain Experienced

kenfain

Posted
Posted

Does the vehicle have more than one relay? On most cars, if there's more than one, you can interchange them from a known working circuit. 

It's been a few years, but I'm pretty sure that they can be tested fairly easily. I've always had good luck using the above method for diagnosis. 

I'd certainly want to eliminate all other possible causes before putting out the money for a new processor. 

Jody l Rookie

Jody l

Posted
Posted

It does, I switched them around but didn't make a difference.  I'm looking at new ecm fron $80 - $150.  Alot of them say for hisun 800 but have different numbers.

Jody l Rookie

Jody l

Posted
Posted

Just wanted to give update . It was the ecm. Put new one on and got spark immediately to front cylinder.  Ran but smoking and no power. I checked back cylinder and no fire. Pulled coil to check with meter and found wire was not getting good connection where it plugs into coil. All good now . She will scream !!!. Next is to figure out why 4x4 switch wont turn.  Thanks for all the imput....

 

  • Like 4
  • 1 month later...
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  • 1 year later...
AliasDave Newbie

AliasDave

Posted
Posted

Laubrey, did you ever get this resolved? I'm having a similar issue and trying to troubleshoot. I've checked pretty much everything, even back-probed the ECU and things look fine, but no spark.
Thanks in advance, Dave

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